[BUG] gm_construct: no skybox, no cubemaps, square shadows, crashes

[Faraon_ZzZ]

[IMG_THUMB]http://img441.imageshack.us/img441/9185/fuckyougarry.png[/IMG_THUMB]
All props and ragdolls cast square shadows. When I try to enter the water or pose a ragdoll, Gmod crashes (memory cannot be read). Black blank is shown instead of cubemaps, mirror and toolgun screen overlay. I tried to: 1. delete all custom content 2. uninstall and manually delete all game files left 3. mount all games 4. mount no games. It didn't help. At gm_flatgrass everything works perfectly. I had these problems at Gm12 gm_construct too, but there were no square shadows and Gmod didn't crash. In Source Filmmaker this map works fine. My OS is Windows XP SP3.

[RonanZer0]

verify game cache [I]instead[/I] of reinstalling.
always works for me when reinstalling does not work if I have a very strange problem!

[Faraon_ZzZ]

[QUOTE=RonanZer0;38193222]verify game cache [I]instead[/I] of reinstalling.
always works for me when reinstalling does not work if I have a very strange problem![/QUOTE]
Didn't help too.

[Faraon_ZzZ]

More ideas?